Shaft for rewinding machines



Sept. 5, 1939. M, R MANN' 2,171,800

SHAFT FOR REWINDING MACHINES Filed Sept. 9, 1957 I INVENTOR MAX. R. MANN Own! a 'iwa ATTORNEYS Patented Sept. 5, 1939 UNITED STATES PATENT OFFICE 3 Claims.

The invention relates to rewinding machines and more particularly to the rewind shaft for such machines.

The main object of the invention is to provide a rewind shaft construction which will readily grip the metal, wood, or paper cores upon which the cut material is rewound regardless of the width of such cores. More particularly, according to the present invention, the rewind shaft is provided with a lengthwise extending groove, and a plurality of core locking fingers are pivotally mounted in this groove eccentrically relative to the core and adapted to be turned from a core release to a core locking position by the turning of the core relative to the shaft and in the locked position act to clamp the core firmly to the shaft.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawing:

Fig. l is a vertical sectional view of a machine equipped with a rewinding shaft embodying the invention;

Fig. 2 is a detail plan View of a rewind shaft embodying the invention, parts being broken away and parts being shown in Section;

Fig. 3 is a detail sectional view taken on the line 3-3 of Fig. 2 showing the locking means in a release position;

Fig. l is a view similar to Fig. 3 showing the locking means in locked position;

Fig. 5 is a perspective view of one of the supports for the pivot shaft for the locking members;

Fig. 6 is a perspective view of one of the locking members.

Referring to the drawing, I have shown in Fig. l a rewinding machine in which the numeral 1 designates the frame, 8 the supply roll shaft, 9 and iii guide rolls, H a cutter backing shaft, and I2 the rewind shaft. One or more cutters l3 cooperate with the shaft i! to cut the material unwound from the supply roll 14 into strips of the desired width which are wound up on cores secured to the rewind shaft i2. As herein shown, each cutter I3 is in the form of a disc mounted on a lever l5 fulcrumed intermediate its ends on an adjustable fulcrum member [6 and normally urged upwardly at its cutter carrying end by a laminated spring I! secured to the opposite end of said lever and carrying a set screw [8 adjustably engageable with a frame member 19 of the machine to tension said spring. The rewind shaft l2 is adapted to be carried in bracket arms 20 which are mounted to swing on or relative to a shaft 2! so that the position of the shaft l2 may be shifted relative to the shaft II as the cut material is wound up on said shaft E2.

The rewind shaft 12, shown in detail in Figs. 2 to 6 inclusive, is adapted to fit at its ends in the bearings provided for it in the arms 20, and for 5 this purpose in one type of rewinding machine one end 22 of the shaft is slotted to engage with means (not shown) for driving said shaft, and the other end is provided with an annular groove 23 to engage with parts, not specially shown, of one of the bracket arms 20.

The shaft I2 has a sector-shaped groove 2 extending lengthwise thereof, and a rod or pivot shaft 25 is mounted at its end portion in aligned bores 26 in said shaft and extends lengthwise thereof adjacent the lower end of said groove 24. A plurality of core locking fingers 2? are pivotaily mounted at one of their ends on the rod 25 in a row. These fingers are formedfrom flat stock metal and are preferably cut at their outer ends to provide a single relatively sharp tooth 28 and a rounded edge 29. While these fingers might be arranged in side by side relation along the entire length of the rod 25, it is preferred to support that part of the rod which extends through the groove 24 at intervals by a series of metal plates or partitions 30 through the openings 30' of which the rod extends and which are mounted in transverse grooves 3| in the shaft and secured therein by peening them at spaced points as indicated at 32. The finger stock is relatively thin, for example, about a sixteenth of an inch in thickness, so that a plurality of fingers are adapted to engage cores of the small-est widths that may be used for rewinding. It is to be noted from Figs. 3 and 4 that the pivot shaft 25 for the fingers 21 is eccentrically mounted relative to the center of the rewind shaft [2.

With this construction, the cores 33 of metal, wood, or paper are placed on the disassembled shaft in juxtaposition to each other, and while the fingers are in the release position shown in Fig. 3. Then as each core is turned in the direction in which rewinding occurs, there is a tendency for the tooth 28 to dig into or engage the inner surface of the core, and as said core is turned, it carries the locking fingers 21 beneath it with it, and because of the eccentric mounting the effective length of the finger relative to the core increases as the finger swings from the position shown in Fig. 3 to the position shown in Fig. 4, so that the fingers exert a wedging action on the core and act to firmly clamp it against the outer side of the Shaft l2. Where the rewinding cores are of paper, the fingers 2'! may be somewhat longer than Where the cores are of harder material. It is also to be noted that the initial gripping effect of the fingers on the core may be aided by turning the shaft l2 clockwise as viewed in Fig. 3 to a position in which gravity will tend to swing the fingers toward the right.

The shaft 25 may be replaced if necessary and is normally held in the shaft l2 by the engagement of a clamping screw 34, having threaded engagement with one end of said shaft I2, with one end of the pivot shaft 25.

With the cores locked to the shaft l2, it may be placed in the rewind machine in the usual manner, and after the rewinding is completed and the shaft with the wound cores is removed from the machine, a simple reverse turning of each core releases it from the locking fingers 2'1, and it may then be readily slipped off of the shaft.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except in so far as such limitations are included in the claims.

What I claim as my invention is:

1. In a rewinding machine, the combination of a rewinding shaft having a lengthwise extending groove, a pivot shaft extending lengthwise through said groove and eccentrically disposed relative to the axis of said rewinding shaft, a plurality of core locking fingers mounted on said pivot shaft and swingable thereon independently from a core release to a core locking position.

2. In a rewinding machine, the combination of a rewinding shaft having a lengthwise extending groove, a pivot shaft extending lengthwise through said groove and eccentrically disposed relative to the axis of said rewinding shaft, partitions arranged at intervals along said pivot shaft to support the same, and a plurality of core locking fingers mounted on said pivot shaft between said partitions and swingable independently about said pivot shaft from a core release to a core locking position as the core is turned relative to said rewinding shaft.

3. In a rewinding machine, the combination of a rewinding shaft having a lengthwise extending groove, a pivot shaft extending lengthwise through said groove and eccentrically disposed relative to the axis of said rewinding shaft, a plurality of core locking fingers mounted on said pivot shaft in juxtaposition and swingable thereon independently from a core release to a core locking position.

MAX R. MANN. 

